This is a complex sentence.
Stories with a science focus
I think it's d because to me that's the only one that makes sense out of all of them.
Answer:
You can study more days after school to get the grade u deserve and also work like 1 hr to 3 hrs to get it down and dont forget it takes time!!!
Explanation: IT helps ive done it before hope this helps you so have a great rest of your day and keep on studying.